1 files changed, 43 insertions, 0 deletions
diff --git a/src/client/Page.elm b/src/client/Page.elm
new file mode 100644
index 0000000..39232e0
--- /dev/null
+++ b/src/client/Page.elm
@@ -0,0 +1,43 @@
+module Page exposing
+  ( Page(..)
+  , toHash
+  , fromLocation
+  )
+
+import Navigation exposing (Location)
+import UrlParser exposing (Parser, (</>), s)
+import String
+
+type Page =
+  Home
+  | Income
+  | Categories
+  | Statistics
+  | NotFound
+
+toHash : Page -> String
+toHash page =
+  case page of
+    Home -> "#"
+    Income -> "#income"
+    Categories -> "#categories"
+    Statistics -> "#statistics"
+    NotFound -> "#notFound"
+
+fromLocation : Location -> Page
+fromLocation location =
+  if location.hash == ""
+    then
+      Home
+    else
+      case UrlParser.parseHash pageParser location of
+        Just page -> page
+        Nothing -> NotFound
+
+pageParser : Parser (Page -> a) a
+pageParser =
+  UrlParser.oneOf
+    [ UrlParser.map Income (s "income")
+    , UrlParser.map Categories (s "categories")
+    , UrlParser.map Statistics (s "statistics")
+    ]